ok. well what i can tell you is i have the qad hunter. on my setup the arm is about 3/16 away from the rolledgaurd. the marks on the rest show that i have the center shot set at 6.25. that 6.25 beening seen on the shelf side. so i would start with looking at the center shot ajustment. oh and on the hunter mod you cam ajust the arm some left to right. hope some of this helps